CVE-2023-50708: yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation
First published: Mon Dec 18 2023(Updated: )
### Impact _What kind of vulnerability is it? Who is impacted?_ Original Report: > The Oauth1/2 "state" and OpenID Connect "nonce" is vulnerable for a "timing attack" since it's compared via regular string > comparison (instead of `Yii::$app->getSecurity()->compareString()`). Affected Code: 1. OAuth 1 "state" https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158 3. OAuth 2 "state" https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121 4. OpenID Connect "nonce" https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420 ### Patches _Has the problem been patched? What versions should users upgrade to?_ TBD: Replace strcmp with `Yii::$app->getSecurity()->compareString()`). ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ not as far as I see. ### References _Are there any links users can visit to find out more?_
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/yiisoft/yii2-authclient | <=2.2.14 | 2.2.15 |
| Yiiframework Yii2-authclient | <2.2.15 |
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Reference Links
- https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-w8vh-p74j-x9xp
- https://github.com/yiisoft/yii2-authclient/commit/dabddf2154ab7e7703740205a069202554089248
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420
- https://nvd.nist.gov/vuln/detail/CVE-2023-50708
- https://github.com/advisories/GHSA-w8vh-p74j-x9xp (Advisory)
Frequently Asked Questions
What is the severity of CVE-2023-50708?
The severity of CVE-2023-50708 is medium due to the potential for timing attacks on OAuth1/2 state and OpenID Connect nonce.
How do I fix CVE-2023-50708?
To fix CVE-2023-50708, upgrade yiisoft/yii2-authclient to version 2.2.15 or later.
Which versions are affected by CVE-2023-50708?
CVE-2023-50708 affects all versions of yiisoft/yii2-authclient up to and including 2.2.14.
What types of attacks does CVE-2023-50708 expose to?
CVE-2023-50708 exposes applications to timing attacks that can compromise the security of OAuth and OpenID implementations.
Is there a workaround for CVE-2023-50708?
There is no specific workaround for CVE-2023-50708; the recommended action is to upgrade the affected software.
- collector/github-advisory-latest
- alias/GHSA-w8vh-p74j-x9xp
- alias/CVE-2023-50708
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